Year	sq. km
1990	7435943.3999999985
1991	7401172.138000001
1992	7407526.141000002
1993	7372483.647000001
1994	7337441.153
1995	7302398.660000001
1996	7267356.168
1997	7232313.674000001
1998	7197271.180000002
1999	7162228.687
2000	7127186.194
2001	7095198.082
2002	7063209.970000002
2003	7031221.858000001
2004	6999233.746000002
2005	6967245.634
2006	6935257.522
2007	6903269.410000001
2008	6871281.298000001
2009	6839293.185
2010	6807305.073000001
2011	6768495.299999999
2012	6729685.527000003
2013	6690875.754
2014	6652065.982000001
2015	6613256.209000002
2016	6574428.279000001
2017	6536779.802000001
2018	6499068.4799999995
2019	6460349.3
2020	6422027
2021	6383440.112000001